The Rapid Assessment of Disease Activity in Rheumatology (Radar) Questionnaire

Authors

  • John Hayes Mason PhD,

    Senior Research Associate, Corresponding author
    1. Arthritis Center, Boston University School of Medicine, the Department of Medicine, Boston City Hospital, and the Department of Medicine, University Hospital, Boston, Massachusetts, and the Division of Rheumatology, Washington University, St. Louis, Missouri.
    • Boston University Arthritis Center, Health Services/Epidemiology Research Unit, A203, 80 East Concord Street, Boston, MA 02118
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  • Jennifer J. Anderson PhD,

    Associate Research Professor of Medicine (Biostatistics)
    1. Arthritis Center, Boston University School of Medicine, the Department of Medicine, Boston City Hospital, and the Department of Medicine, University Hospital, Boston, Massachusetts, and the Division of Rheumatology, Washington University, St. Louis, Missouri.
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  • Robert F. Meenan MD, MPH,

    Professor of Medicine
    1. Arthritis Center, Boston University School of Medicine, the Department of Medicine, Boston City Hospital, and the Department of Medicine, University Hospital, Boston, Massachusetts, and the Division of Rheumatology, Washington University, St. Louis, Missouri.
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  • Kathleen M. Haralson MA,

    Physical Therapist
    1. Arthritis Center, Boston University School of Medicine, the Department of Medicine, Boston City Hospital, and the Department of Medicine, University Hospital, Boston, Massachusetts, and the Division of Rheumatology, Washington University, St. Louis, Missouri.
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  • Donna Lewis-Stevens MA, CMNP,

    Rheumatology Nurse Practitioner
    1. Arthritis Center, Boston University School of Medicine, the Department of Medicine, Boston City Hospital, and the Department of Medicine, University Hospital, Boston, Massachusetts, and the Division of Rheumatology, Washington University, St. Louis, Missouri.
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  • Jeffrey L. Kaine MD

    Clinical Rheumatologist
    1. Arthritis Center, Boston University School of Medicine, the Department of Medicine, Boston City Hospital, and the Department of Medicine, University Hospital, Boston, Massachusetts, and the Division of Rheumatology, Washington University, St. Louis, Missouri.
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Abstract

Objective. This study documents the measurement properties of a brief, self-administered questionnaire of disease signs and symptoms in patients with rheumatoid arthritis.

Methods. The Rapid Assessment of Disease Activity in Rheumatology (RADAR) questionnaire assesses joint pain/tenderness and clinical status. One hundred ninety-three pairs of RADAR forms were completed by 45 subjects and their assigned clinician evaluators.

Results. Subject—clinician agreement (intraclass correlation coefficients [ICC]) for joint pain/tenderness and clinical status ranged from 0.52 to 0.87 (P = 0.0001), with 83% ≥0.65. The ICC for change in joint scores over 6 months was 0.83 (P = 0.0001).

Conclusion. The 2-page RADAR questionnaire produces valid estimates of joint count and clinical status that are sensitive to change.

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